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EP0910078A3 - Optical device for photomagnetic recording, used in a recording/reproducing apparatus - Google Patents

Optical device for photomagnetic recording, used in a recording/reproducing apparatus Download PDF

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Publication number
EP0910078A3
EP0910078A3 EP98402580A EP98402580A EP0910078A3 EP 0910078 A3 EP0910078 A3 EP 0910078A3 EP 98402580 A EP98402580 A EP 98402580A EP 98402580 A EP98402580 A EP 98402580A EP 0910078 A3 EP0910078 A3 EP 0910078A3
Authority
EP
European Patent Office
Prior art keywords
optical recording
recording
magnetic field
light
recording medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98402580A
Other languages
German (de)
French (fr)
Other versions
EP0910078A2 (en
Inventor
Ariyoshi Nakaoki
Kenji Yamamoto
Akira Kouchiyama
Akira Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP9285452A external-priority patent/JPH11120643A/en
Priority claimed from JP28545197A external-priority patent/JP3783367B2/en
Priority claimed from JP9285455A external-priority patent/JPH11120644A/en
Application filed by Sony Corp filed Critical Sony Corp
Publication of EP0910078A2 publication Critical patent/EP0910078A2/en
Publication of EP0910078A3 publication Critical patent/EP0910078A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
    • G11B11/10554—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base the transducers being disposed on the same side of the carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/1058—Flying heads

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

An optical device is provided which has a light converging unit (41, 42) for converging the light illuminated on a magneto-optical recording layer (2a) of an optical recording medium (2) and a magnetic field generating unit provided on the light converging unit (41, 42) towards the optical recording medium (2). The diameter of the light beam radiated on the magneto-optical recording layer (2a) of the optical recording medium (2) is controlled by a light transmitting hole of the magnetic field generating unit. The light beam illuminated on the magneto-optical recording layer (2a) of the optical recording medium (2) is not fluctuated in diameter so that it is possible to produce a magnetic field at a low power consumption. In addition, the magnetic field generating unit is not liable to be ruptured. There is also provided a recording and/or reproducing apparatus employing this optical device.
EP98402580A 1997-10-17 1998-10-19 Optical device for photomagnetic recording, used in a recording/reproducing apparatus Withdrawn EP0910078A3 (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP28545297 1997-10-17
JP9285452A JPH11120643A (en) 1997-10-17 1997-10-17 Optical element for magneto-optical recording and recording and/or reproducing device
JP28545197 1997-10-17
JP28545197A JP3783367B2 (en) 1997-10-17 1997-10-17 Optical element for magneto-optical recording and recording / reproducing apparatus
JP28545597 1997-10-17
JP285451/97 1997-10-17
JP9285455A JPH11120644A (en) 1997-10-17 1997-10-17 Optical element for magneto-optical recording and recording and/or reproducing device
JP285452/97 1997-10-17
JP285455/97 1997-10-17

Publications (2)

Publication Number Publication Date
EP0910078A2 EP0910078A2 (en) 1999-04-21
EP0910078A3 true EP0910078A3 (en) 2001-12-19

Family

ID=27337176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98402580A Withdrawn EP0910078A3 (en) 1997-10-17 1998-10-19 Optical device for photomagnetic recording, used in a recording/reproducing apparatus

Country Status (2)

Country Link
US (1) US6922376B1 (en)
EP (1) EP0910078A3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001006210A (en) * 1999-06-22 2001-01-12 Sony Corp Optical recording medium and disk cartridge
JP4019615B2 (en) * 2000-03-10 2007-12-12 富士ゼロックス株式会社 Magneto-optical element, magneto-optical head, and magnetic disk apparatus
KR20040045473A (en) * 2001-10-05 2004-06-01 코닌클리케 필립스 일렉트로닉스 엔.브이. Method of manufacturing a digital magneto-optical signal write/read head and write/read head manufactured according to the method
JP2003178498A (en) 2001-12-11 2003-06-27 Fujitsu Ltd Magnetic head and data recording / reproducing device
JP3668189B2 (en) 2001-12-27 2005-07-06 富士通株式会社 Optical head and optical information processing apparatus
US20070146864A1 (en) 2003-06-25 2007-06-28 Koninklijke Philips Electronics N.V. Magneto-optical device
JP4081480B2 (en) * 2005-08-19 2008-04-23 株式会社日立製作所 Head for magneto-optical fusion recording apparatus and magneto-optical fusion recording apparatus

Citations (14)

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JPH02294903A (en) * 1989-05-09 1990-12-05 Mitsubishi Electric Corp Magnetic head
EP0411783A2 (en) * 1989-07-29 1991-02-06 Sony Corporation Magneto-optical pickup apparatus and magneto-optical recording/reproducing apparatus
JPH0474335A (en) * 1990-07-17 1992-03-09 Sony Corp Magnetic field modulation type overwrite magnetic head
JPH0474334A (en) * 1990-07-13 1992-03-09 Toshiba Corp Magneto-optical recording lens
JPH0476844A (en) * 1990-07-19 1992-03-11 Sony Corp Magnetic field modulation type overwrite magnetic head and manufacture of the head
EP0492888A2 (en) * 1990-12-27 1992-07-01 Sony Corporation Of America Thin film magnetic head for use with magneto-optic disk drive
EP0549236A2 (en) * 1991-12-24 1993-06-30 International Business Machines Corporation Optical disk storage system and head apparatus therefor
JPH05325316A (en) * 1992-05-27 1993-12-10 Kyocera Corp Objective lens of optical head for magneto-optical recording device
US5293360A (en) * 1989-03-09 1994-03-08 Canon Kabushiki Kaisha Magnetic field generating device
US5295122A (en) * 1991-07-09 1994-03-15 Fuji Xerox Co., Ltd. Flying head of a magneto-optical recording apparatus
WO1998048418A1 (en) * 1997-04-18 1998-10-29 Read-Rite Corporation Thin-film electro-magnetic coil design for use in a flying magneto-optical head
WO1998048409A2 (en) * 1997-04-18 1998-10-29 Read-Rite Corporation Electro-magnetic coil assembly
WO1998049675A1 (en) * 1997-04-29 1998-11-05 Terastor Corporation Electro-optical storage system with flying head for near-field recording and reading
EP0878793A2 (en) * 1997-05-16 1998-11-18 Sony Corporation Recording/reproducing apparatus and a magneto-optical recording medium for use therewith

Family Cites Families (16)

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US5105408A (en) * 1988-05-12 1992-04-14 Digital Equipment Corporation Optical head with flying lens
US5150338A (en) * 1989-08-10 1992-09-22 Hewlett-Packard Company Optical disk reading and writing system having magnetic write head mounted on an air-bearing slider
US5124961A (en) * 1989-12-28 1992-06-23 Fuji Xerox Co., Ltd. Floating head for use with a recording apparatus of magneto-optical memory device
JP2861188B2 (en) * 1990-01-31 1999-02-24 ソニー株式会社 Magneto-optical recording / reproducing device
US5235581A (en) * 1990-08-09 1993-08-10 Matsushita Electric Industrial Co., Ltd. Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses
US5470491A (en) * 1992-07-03 1995-11-28 Mitsubishi Denki Kabushiki Kaisha Process for producing a thin-film magnetic head having an insulation formed of a ladder-type silicone resin
JPH0676238A (en) * 1992-07-08 1994-03-18 Fuji Electric Co Ltd Thin-film magnetic head
US5497359A (en) * 1994-08-30 1996-03-05 National Business Machines Corporation Optical disk data storage system with radiation-transparent air-bearing slider
JP3567515B2 (en) * 1995-02-15 2004-09-22 ソニー株式会社 Optical pickup device
TW409248B (en) * 1996-05-01 2000-10-21 Terastor Corp Flying head with solid immersion lens
US6243350B1 (en) * 1996-05-01 2001-06-05 Terastor Corporation Optical storage systems with flying optical heads for near-field recording and reading
JPH10112036A (en) * 1996-10-07 1998-04-28 Hitachi Maxell Ltd Recording and reproducing device
US5903525A (en) * 1997-04-18 1999-05-11 Read-Rite Corporation Coil for use with magneto-optical head
US6055220A (en) * 1998-03-31 2000-04-25 International Business Machines Corporation Optical disk data storage system with improved solid immersion lens
US6130779A (en) * 1998-07-06 2000-10-10 Read-Rite Corporation Near field magneto-optical head made using wafer processing techniques
US6069853A (en) * 1998-08-21 2000-05-30 Terastor Corporation Head including a heating element for reducing signal distortion in data storage systems

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293360A (en) * 1989-03-09 1994-03-08 Canon Kabushiki Kaisha Magnetic field generating device
JPH02294903A (en) * 1989-05-09 1990-12-05 Mitsubishi Electric Corp Magnetic head
EP0411783A2 (en) * 1989-07-29 1991-02-06 Sony Corporation Magneto-optical pickup apparatus and magneto-optical recording/reproducing apparatus
JPH0474334A (en) * 1990-07-13 1992-03-09 Toshiba Corp Magneto-optical recording lens
JPH0474335A (en) * 1990-07-17 1992-03-09 Sony Corp Magnetic field modulation type overwrite magnetic head
JPH0476844A (en) * 1990-07-19 1992-03-11 Sony Corp Magnetic field modulation type overwrite magnetic head and manufacture of the head
EP0492888A2 (en) * 1990-12-27 1992-07-01 Sony Corporation Of America Thin film magnetic head for use with magneto-optic disk drive
US5295122A (en) * 1991-07-09 1994-03-15 Fuji Xerox Co., Ltd. Flying head of a magneto-optical recording apparatus
EP0549236A2 (en) * 1991-12-24 1993-06-30 International Business Machines Corporation Optical disk storage system and head apparatus therefor
JPH05325316A (en) * 1992-05-27 1993-12-10 Kyocera Corp Objective lens of optical head for magneto-optical recording device
WO1998048418A1 (en) * 1997-04-18 1998-10-29 Read-Rite Corporation Thin-film electro-magnetic coil design for use in a flying magneto-optical head
WO1998048409A2 (en) * 1997-04-18 1998-10-29 Read-Rite Corporation Electro-magnetic coil assembly
WO1998049675A1 (en) * 1997-04-29 1998-11-05 Terastor Corporation Electro-optical storage system with flying head for near-field recording and reading
EP0878793A2 (en) * 1997-05-16 1998-11-18 Sony Corporation Recording/reproducing apparatus and a magneto-optical recording medium for use therewith

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Title
ICHIMURA I ET AL: "HIGH-DENSITY OPTICAL RECORDING USING A SOLID IMMERSION LENS", APPLIED OPTICS, OPTICAL SOCIETY OF AMERICA,WASHINGTON, US, vol. 36, no. 19, 1 July 1997 (1997-07-01), pages 4339 - 4348, XP000697440, ISSN: 0003-6935 *
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TOMOHIRO KODA ET AL: "NEW STRUCTURE DISK FOR A MAGNETO-OPTICAL COMPOSITE HEAD SYSTEM", JAPANESE JOURNAL OF APPLIED PHYSICS,JP,PUBLICATION OFFICE JAPANESE JOURNAL OF APPLIED PHYSICS. TOKYO, vol. 31, no. 2B, 1 February 1992 (1992-02-01), pages 551 - 553, XP000323483, ISSN: 0021-4922 *

Also Published As

Publication number Publication date
US6922376B1 (en) 2005-07-26
EP0910078A2 (en) 1999-04-21

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